The University of Minnesota Experience: Sustainable Electric Energy Systems. Research and Education
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1 The University of Minnesota Experience: Sustainable Electric Energy Systems Research and Education Ned Mohan, University of Minnesota NSF-Sponsored Workshop on Electric Energy Research and Education Doha, Qatar December 13-16, 2009
2 Financial Crisis, Energy Crisis and Production and Consumption Climate Change 700 B$/yr Source: DOE
3 Electric Power Generation by Fuel Type: Source: DOE
4 Need and Challenges in Workforce Development ( a ) ( b )
5 Need for an Integrated Curriculum 161kV V 0 Time Low-Voltage Ride-Through Hz V Power Electronics Converters Generator 690V 60 Hz 34.5 kv
6 UMN Undergraduate Curriculum Power Electronics Core Courses Power Systems Electric Drives Complementary Course Analog and Digital Control Communication Digital Signal Processors Field Programable Gate Arrays Programming Languages Heat Transfer, Thermodynamics Economics and Policy Issues Mecahnical Systems Electric Energy Systems Programming Languages Control Systems (a) (b)
7 Power Electronics Course ( a ) ( b)
8 Power Electronics Lab
9 FPGA Controller ( a ) ( b)
10 Electric Drives Course Electric Drive Electric Source (utility) fixed form Power Processing Motor Unit speed / adjustable position form Sensors Load Controller input command (speed / position)
11 b axis 120 o i b B B i i s Use of Space Vectors s Bis at time t magnetic axis of the equivalent winding with current I ˆ s i c Bis i a a axis o 0 B i s 0 ( ) a axis Bi s Bis i s is a axis I ˆs c axis 240 o (a) (b) Fig. Fig Space Space-vector representation representation in in ac ac machines. machines. - Physics-based approach Fig. Fig. A-9 B-6 Space Space vector vector representation of sinusoidal of sinusoidal flux density flux density distribution. distribution.. e. f Bu Bi (c)
12 Graduate-Level Textbook: Mutual Inductance between dq Windings on the Stator and the Rotor at t q axis d i sq 3 N turns 2 s L L L s m s L L L r m r 3 N 2 s i rq 3 N 2 s i s i r 3 2 i sq 3 2 i sd i rd 3 2 i rq 3 m 2 i rd da da d 3 N 2 s i sd i sd m m d axis A axis rotor a axis stator L i L i L i L i Figure 3-3 Stator and rotor mmf representation by Figure 3-3 sd Stator and s sd rotor representation m rd by equivalent rd dq r winding rd currents. m sd The dq winding equivalent voltages dq are winding defined currents. as positive at the dotted terminals. Note that the relative positions of the stator and the rotor current sq L s i sq L m i rq rq L r i rq L m i sq space vectors are not actual, rather only for definition purposes.
13 Electric Drives Lab: - Low-cost; 42-V no Shock Hazard! - DSP Controlled; easy to use - Active Load Allows Experiments otherwise not possible - Very Popular with students! Drives Board for Motor and Active Load (Generator) 42 - V Motor Set
14 Power Systems Course Bus-1 200km Bus-3 Pm1 P e 1 150km Bus-2 150km P jq P e2 P m2 Balanced Coverage of Topics Changing Landscape and Resources Apparatus in Generation & Delivery of Power Analysis and Operation Protection
15 Curriculum Developed: Power Electronics Features: Switching Power-Pole as the Building-Block Includes dc-dc Converters and dc-ac Inverters Feedback control of Converters Textbook - Slides - Solutions manual Hardware Lab Teaching Machines as a subcomponent of Drive Systems Electric Source (utility) Electric Drives fixed form Power Processing Unit (PPU) Controller Electric Drive adjustable form input command (speed / position) Motor Sensors speed / position measured speed/ position Load Power Signal Applications: - Harnessing of Wind Energy - Electric and Hybrid-Electric Vehicles Textbook - Slides - Solutions manual Pm1 P e 1 Power Systems Bus-1 Textbook - Slides - Solutions manual Bus-2 Includes Topics such as - Renewables/Storage - HVDC, FACTS - Voltage Stability Software-based Lab: P e2 P m2 Bus-3 Increasing Enrollments: Power Systems 90 Power Electronics 118 Electric Drives- 124 (Yr ) DSP-Controlled Lab - MATLAB/Simulink, PowerWorld, EMTDC - Complete Lab on CD - 18 Short Video Clips - Course Learning Objectives - Online Homework Problems - Course Learning Objectives - Online Homework Problems - Course Learning Objectives - Online Homework Problems HiRel Systems Duluth, Minnesota Phone: Lab Manuals can be downloaded from:
16 Applied to DOE-FOA-152: A Nationwide Consortium of Universities to Revitalize Electric Power Engineering Education by State-of-the-Art Laboratories 82 Universities
17
18 Thank You!
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